Reference

Synthesis and isomerization cyclization of poly(cyanoureas) containing imide units

Synthesis and isomerization cyclization of poly(cyanoureas) containing imide units. Barashkov, N. N.; Evstaf'ev, V. P.; Telesov, E. N.; Pravednikov, A. N. (Nauchno-Issled. Fiz.-Khim. Inst. im. Karpova, Moscow, USSR). Vysokomol. Soedin., Ser. A, 20(7), 1586-92 (Russian) 1978. CODEN: VYSAAF. ISSN: 0507-5475. DOCUMENT TYPE: Journal CA Section: 35 (Synthetic High Polymers) Imide-contg. poly(cyanoureas) (I, Z = O, CO) were prepd. by polycondensation of N,N'-bis(o-aminocyanophenyl) diimides (II) with 4,4'-diphenylmethane diisocyanate at 60-70° in N-methypyrrolidone in the presence of Ba3N catalyst. On heating I to 300° for 1 h, cyclization occurred with complete disappearance of the IR absorption for CN groups. A 2-stage cyclization is proposed, involving initial formation of an iminoquinazolinone structure which isomerizes to an aminoquinazolinone structure. The final polymer probably contains both structures. There are some commonly used reagents like 1885-29-6 in this article. The noncyclized I had glass transition temps. 330-55° and exhibited initial wt. loss at 395-440°. Rate consts. and activation energies are given for various stages of the cyclization-isomerization. The structure of the polymers was verified by synthesis of model compds. from anthranilonitrile [1885-29-6] and PhNCO [103-71-9]. .

Metabolism of benomyl in carrot, strawberry and apple

Metabolism of benomyl in carrot, strawberry and apple. Rouchaud, Jean P.; Lhoest, Georges J.; Mercier, Michel J.; Meyer, Joseph A. (Lab. Phytopathol., Univ. Cathol. Louvain, Louvain, Belg.). Pestic. Sci., 8(1), 23-30 (English) 1977. CODEN: PSSCBG. DOCUMENT TYPE: Journal CA Section: 5 (Agrochemicals) Following benomyl [17804-35-2] treatment in carrots (8 treatments of 104 kg a.i./ha), strawberries (3 treatments of 80, 160, and 240 mg/plant), and apples (9 treatments of 300, 600, or 900 g a.i./ha) metabolites in all cases, detected by gas-liq. chromatog., were carbendazim [10605-21-7], 2-aminobenzimidazole [934-32-7], benzimidazole [51-17-2], 2-aminobenzonitrile [1885-29-6], o-phenylenediamine [95-54-5], conjugates of carbendazim and 2-aminobenzimidazole, and 2 unidentified compds. Concns. of these metabolites were low after benomyl treatment at the normal rates.